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Finding the Fourth Proportional to 247,930.83, 342,165.31 and 139,033.46

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Solution

The fourth proportional to 247,930.83, 342,165.31 and 139,033.46 is: 191,877.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,930.83 : 342,165.31 = 139,033.46 : x
  2. Step 2: Convert to fraction form
    247,930.83/342,165.31 = 139,033.46/x
  3. Step 3: Cross multiply
    247,930.83x = 342,165.31 × 139,033.46
  4. Step 4: Simplify right side
    247,930.83x = 47,572,427,449.10
  5. Step 5: Solve for x
    x = 47,572,427,449.10/247,930.83
  6. Step 6: Final answer
    x = 191,877.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.